Liquid cooling device



1942. H. w. KLEIST LIQUID cooLnxe DEVICE Fil'ed May 28, 1937 trates oneSystem 1 device I'. 'Ihis liq'id'cqoling device is provided such as' toprovide idteuted-Feb. 3; 1942 "PATENT? v FF'1CE 4 -udmv COOLING msvmuHuman W. Kleist, 'Cliicgo, Ill. nssignor to Dole lldtrigeratin: Combany,

ration o! Illiuois Chicago, Ill.' a corpo- Application May28,1937s&:1511%.145,353

. This inventiofi relates to liquid cooling d dvices and has for iosobject to provide a new a.nd improved device tion has a s a furtherobject 110 provide a liquid cooling device' particulia.rly adapted forcooling of this description. -The iriven-- beverages. The, invention hasas a further 'ob-' ject to provide a. liquid cooling device particularlyjadaptled for quickly a.nd efliciently cooling milk.

The invention has as further objecit to provide a. liquid cooling devidefor bgverages-which shall be clean am]. sanitary. The inventioi1 hasother manner, as by being brazed qr objects which will be moreparticularly pointed out in the a.wompanying decription.

Referring now -t0 the drawin'g, Fig. 1 is a perspective view showing a.cooling system Provided.

with one form of liquid cool ing device em dying theinvention;

- coil, as shown for Fig. 2 isan enlarged view, with i)arts broken a.wayshowing the cooling coil anti associated parts;

2, with parts br oken away;

3 showing al prts Chroughoi1t hown may be used for enla.rged sjdctionalview ta1igen 'on form of nipple for use '20 Fig. 3 is an enlargedsectionai view taken on cooling any desired beverage, it isparticula.rly j adapted for cooling milk. In coolirig milk, the milkmust remain in contactwith thev cooling surface for a. considerable timeand the cooling surface must be such a.s to be easily clea.ned

' after one use and before the next use, so a.s to produce an abs0lutelysanit ary device an.d pr'e- 'ported on th'e plates 2 und 3 by vent a.nyconta .mination of the milk being cooled.

Referr'mg now to the dr9.wing Fig. 1 illus embodying the liquid cooiingwith two metal' plates 2 und 3 which am preferably smooth pla.tes madeof shee't met.l preiera.bly of sta.inless steel. Between these' blatesare placed a refrigeiant conduit which is illus- 'oratedas a coi1 ofpipe l. 'I'he construction is a hgarmetically s'ealed recepta.cle forthe pipe. In the construction show1rthe plat es2 a.nd l a.re integralund are bent into a U-shaped construction,leaving the ends engl. Eachepd is clo sed by a member i which is h metiqallfr'mected with thelatesland 3 as,

- 'pa.ssedalpng the cooling device.

'trated this device p1ates in position withdrawn, autdmaticall& closes2l.-- Wh en the milk can is filled can maiy;be taten to-mfor example, bybrazing, weldin3, o'r the like; The members 5 project beyond the plates2 and 3,.as illustrated for example, in Figs. 1 and 3, so as 1:0main'tain the liquid pa.ssing over the -on the plates a'r1dprevent'itfrom running ofi at the ends. 'I'he two pletes a.re hermetically sealed'at the' top in any desired weldad tqgiather The 151a.tes areheld-in'contactwith the coil by exhaustin'g the the atmospheric pressureprgsses the two pl ai:es in intimate contact with the v2px:ious loops ofthe example in Figs. 3 und 5. 'Ihe air is withdrawn i'ibm the dv ice inany desired manner as by means of a nippib 1 which is conndcted with a.withdrawing devicz'a; This nipple l, as illustnated; passes through oneof the plates und ha.s a; passage'way 8 communicating with the spacebetwieen the plates. There is a check valve o'i some suita.ble kindfiwhich. Whel i the air is the pia.ssage way 8. Asherein shown, -I ha.veillustrated a ball' valve 9 located ins) space II! in the nip'ple. Aftera.ir is exha.usted there.is a. plug' H w hichploses The device issuppoflzedjin a.ny desifed manner and for' purposesof legs l2 for thispurpose.- Thema is provided a1; the top, some means for distributing themilk or I provide a I 3 exterlding As herein shown, trough along the topof the dmvice, the tgough having an opening II ab" the bottom liquidnasses. extendingall the way along o'r there may be a. serie s ofOpenings close together. This trough is -supported in desired manxierund it may be supand I6. Located a.t the bottom oi'the deviqeis afedeptacle H for receiving the liquid after i t has I h'aveillustroughwhich 'is slightly 'Ihls trough a.s 'a. inclin6dfr'om one endto the other. is 'provided with a. discharge device its lower end,Whit:h is provided .with a valve l9.

'I'iie milk or other liquid is placed in thetrough I3 und thenpasses-down along the faces of the wh ich ha.ve been cooled by thethenpg.ss as inho;the rz'acebtacle the dishre devi6e lt in'to a.nyh'qlding device ch the valve llis clo'sed und the milk desired placg.;As he'rgaiu sho viti. I hsvep;ovidgcl aii' frdin betvir'iaep them sothat Illustration I have shown There ma.y \bea single opeuing.

the members I5 or pipe I8a.b

asthqamilkcan inserted.

a refrierated storage tarik 2I- having a lid 22 and into which the cansof cooled milk are placed.

The plates2 and 3 may be coo led in any deals the bottom than at thevided for insuring the proper transmission o! coils of the pipe I. Thisrefrlgerating machine is also used to cool the storage tank 2I. In Figs.1 150 4 I have illustrated the plates 2 and 3.as being inclined, whereasin Fig.-5 I have shown these plate as being straight; or substantiallyparallel. 'Ihe constructionwhere the plates are inclined is the preferred construction because of the fact that when the liquid is broughtinto contact with the plates at the top thereof; gravity helps- 1:0 holdthe liquid into contact with the plates, dueipo their inclination, andthat insures a better contact of the liquid with the plates and causesthe liquid to adhere better to the plates; provlding a. thin fllm o fliquid flowin'g along the plates, thus givinggreater efi:lciency forcooling.

Furthermore, the inclination of the plates tends to retard ordelay themovemeni: of the liquid along the plates so as to keep ii: in contaci:with the plate longer than would otherwise be the case, and this makesit possible to cool it with plates o1 lass height than would otherwisebe required.

'I'he discharge from the trough I3 is such as to each of the plates 2and 3.

I may use the device wherein the plates simply have the coils betweienthem and the air exhausted.v If desired, however, I may partially fillthe space between the plates with ahy desired eutectic solution, such asany of the usual solutions used for this purpose. When such eutecticsolution is used, it is of course understood that the insure' athin'layer of liquid on the surface ofair is exhausted from between theplates so that the outside atmosphere presses the plates tightly againstthe pipe l. When certain type of eutectic solution e're used, lt h'as been found that when f reezing, certain sal ts will separate andbedeposited and will be again redissblved, proviclihg the distancethrough which they ar'e to bis redissolved i.s not tpo grea t. Itherefore prefer to pro vide at the open end of each loop of the coil aholding member 26 which extends across the spacebetween the coils andwhich.pr'events these sep.rai:ed salts .frbm running down to thebottom:so as to accumulate and hOlds them in betwden the coils sothat'they can be readily and easily redissoNed. When a eutectic is placed in-between the pla'tsI provide some meaxis for easily accomplishing thissuch for example, as 4 29 through which the solution may be the nipple lThis eutectic solution niay be inserted in any desired manner. The'easiest way, for example, is to draw lt in when the air is being drawnout. When the air i3'drawn out, the'valve 9 will -m t'omatically bemaintai'ned losea and the nipple 29 man be clo sed in am desired manneras by .means of a. plug 30. 'I'hie nipples l and 29 in this instancecannot very well be located on the top edge ot the plate andhence theymay be located at one end, andthey may be loc atgd at any poi nt alongthis end. II they are loeated as shown-in Fig. 3, then ii: is necessaryto.place the plateson end when the air is being vv}rii:hdrwrn and theeutectic solution is being iuserted, so thatduring this process i;lieywill be at the top.

' rate .from the refrigerating satisfactory results.

machine is available heat from the plates to the coils. Onemeang fo rsecuring this result'is to have the successive sections of the coilvarying in diameter. A5 shown in Fig. 3, the sections of the coilincrease in diameter from the top toward the bottom so as to insure aproper contact between the sections ofthe coil and the pltes. Anintimate contact between the plates and the sections of the coil may besecured in any desired manner. It is preferably secured by -utilizingthe'pressure of the atmosphere on the outside of the plates press theminto intimate contact with the sectiohs of the coil. This isaccomplished by exhausting air from between the plates either whenthe're is no eutectic solution in between them or when there thesepieces and these pieces presslad tightly against the sectiongof the coilso that the heat will be transmitted from the plates to the coils. Asbefore stated, the device may be used with or without the eutecticsolutio'ri between the plates. I have illust'rated the eutecticsolution, however, as being used, the eutectic solution beingrepresented at 32. When this solution is used, it will act as astoragedevice for, as it were storing up' the cold so that a lowertemperature can be secured and so that the device can be usedsepamachine .fter the eui;ectic solution has been solidified and willlast a considerable time'. Any suitable eutectic solution m'ay be used.I have found a eutectic solution made of sodium carbonate and water,about the proportions of eight percent of sodium carbonate andninety-tWo percent water, 'gives very This arrangement would beimportant; fo;- example, where one refrigerating and it could be changedto connect it with one after of these cooling device5,

I .claim:

another 015 a number 1. A liquid cooling device comprising: two 'opposedplates having substantially plane outer.sur-

faces and separated by a space and being inclined A with relation to thevertical to i'orm' two oppositely inclined plane surfaces, the platesbeing more widely separated a1: the bottom than at the top, a. pipethrough which a r'effigerant is passed, extending back and forth betweensaid plates in a. horizontal direction, the oppsea inner iaces tig'htlyengaging the sa me bend of the pipe, and aliquid distributing device atthe tops oi" seid plates arranged to distribute the liquid along thetops of the plates, the

passing down by gravity said liquid to be cboled along' the outersurface of said plates. the inclirie o1 the plates ca.usin3 the liquidto be brought into intimate contact therewith.

2; A liquid coollng device compiisin'g two. opv pos'ed plates havingsubstantiall'y plane outer surfaces and separated.by a space, the platesbeing more widely separated ab the bottom than at the top to Iorm"tw'ooppositely inclinted plane surfaceS, a coiled pipe for the cool i ngfluid located 'between the plates and extending back and forthhorizontally between the plates, the diameter of 4. A liquid coolingdevice tiie sections of the pipe increasing from i:he

top toward the bottom so as 150 be in co1itact with seid plates, meansfo'r tightly pressing the'plates against the coil sections und a liquiddist1ibuting device at the tops o! said plates, arranged to dist ributathe liquid along the tops of the plates, the seid liquid to be cooledpassing down by gravity along the outer surfaces of sa.id pla tes.

3. A liquid cooling device comprising two opposed plates havingsubstantially plane outer surfaces sind separated bya space, the platesbeing more widely separated at the bottom than at the top to form twooppositely. inclined plane surfaces, a. coiled pipe for the coci1ingfluid located between the plates und extending back and forthhorizontally between the plates, the diameter of the sections of thepipe increasing from the top toward the bptbom so as to be in conizactwith seid plates, means for utilizing thepressure 01 the atmosphere onthe outer faces cf said plates to tightly pre ss the plates againstsaidcoiled pipe und a liquid distributing device a1: the tops cf s9.idplates. arranged to distribute the liquidalong the tops o! the plates,the said liquid to be cooled passing down by gravity alon'g the outersurtaces ot said plates.

posed plates having substantially plane outer surfaces und separated bya. space, th; plates being more widely separated a.t t he bottom than atthe top to form two oppositely inclined suri'aces, a. coiled pipe im thecooling fluidlocated between Y the plates and extending back und iorthhorizontally betWeen them, the dlameiaer of the sec tions 01 the pipeincreasing bottom so as .to be in contact; with said plates, mea.ns for1itilizing the pressure of the atmosphere, on' the outer Ia.ces of saidplates to tightly press the plates again5t said coiled pipe, a liquiddistributing deviceat the tops bfsa.id plates, ar-

ranged to distribute tlie liquid alongthe tops oi the pla.tes' the saidliquid to be cooled passing down by (gravity along spa.ce between theplates.

'comprisixig two opirom the top toward the 5. A liquid cooling devicecomprising two opposed plates ha.ving substantially plane unter surfaces and separat edby a space, the plates being morewidely separated atthe bottom than at the top, a. coiled pipe for the cooling fluidloca.ted between the plates, the diameter of the sections of the pipeincreasing from the top toward the bottom so as to be in contact withsaid plates,

ineanS for utilizing ehe pressure of the atmosphere on the outer faces01 said pldtes to tightly press the plates againstsa'id coiled pipe, aliquid distributing device a1; the tops cf said plates, arranged todistribute the liquid :ilong 'the tops of the plates, the said liquid tobe cooled passing down by gravity 'along the outer surfaces of saidplates, a eutectic solution partially filling the spa.ce between theplates, and.holding members at the open ends of the coil sections imholding any precipitated from the eutecsections.

6. A liquid cooling device comprising two opposed plates havingsubstantially plane outer surfaces and separated by a spa0e antiarranged in a. substantially vertical position, a cooling coil locatedin the spa.0e between said plates for cooling the plates, inetal membersat intervals between the cooling coil am]. the plates,'means for tightlypressing the plate against said metal members und a. liquid distributingdevice at the tops of said plates, a'rranged oo distribute the liquidalong the tops of the 'plates, the said liquid to be cooled passing downby gravity along i;he guter surfaces of said plates.

7. A liquid cooling device comprising two opposed *plaites havings1lbstantilli plane outer surfaces a.nd separated by a. spade, a coiledpipe f01 the cooling fluid loca.ted b etween the plates,

- meang forutilizing the pressure of the atmosphere 9'xi the outer Iacesof seid pldtes to tightl r' y press the plates against sa id coiledpipe, and a the outer suxiaces o1 said fila.tes und a. eutectic solutionpurtia.lly fllling the .eutectic solution into separated HERMAN eutecticsolutionpartially fllling the Space between the plates and means forseparating the portions.

W. KLEIST.

